Tamron introducing special type
of Di-II series lens which is optimized especially to meet the performance
characteristics of Pentax digital cameras. Tamron 17-50mm f/2.8 Di II Sp lens
fall in the super performance (SP) lens category. SP series lenses are Tamron's
high performance lenses featuring outstanding specifications and superior
performance compared to other Tamron lenses. SP lenses are also famous for their
impressive and innovative design. The new Extra Refractive Index (XR) glass used
in manufacturing which helps in overall compactness of the lens while
maintaining the same aperture values as previous lens. The low dispersion (LD)
glass elements reduces all types of aberrations and thus increases the sharpness
of resulting images. To achieve the best image quality and high performance
Tamron 17-50 mm f 2.8 LD Di II lens is constructed using two Hybrid Aspheric
Lens elements. This lens is top-level in its class maintaining 0.9 feet (27 cm)
of minimum focusing distance throughout its entire zoom range. Tamron's SP AF
17-50 mm offers a wider angle with autofocusing option. Due to its wide-angle
focal length of 17mm, this lens is suitable for indoor photography. Special
Internal Surface coatings to reduce the reflection of light inside the lens,
thus eliminates ghosting and flare.